Firewall (Linux new-comer)

["Matthias Mann" <Matman@gmx.li>]

Hi people!

I´m sitting on a single computer. Yesterday i´ve read the firewall-HOWTO and
was very confused cause there are examples for a network system. Is there
any possibility to build a firewall or other usefull security systems for my
machine? I like to use netscape navigator to have fun and for my work at
internet. And i don´t like that others have access to my computer. Wich
packages of Debian 2.2 potato  should i use for this purpose? Or is there
some better software available of other developers?

Have a lucky day!